Surfacing unit



May 2, 1933'. A. c. FISCHER SURFACING UNIT Filed July 9, 1928 7 wharf KfZ a/ze f Patented May 2, 1933 ALBERT O. FISCHER, OF CHICAGO, ILLIN'OIMANUFACTURING COMPANY,

SUB/FACING s, ASSIGNOR TO THE PHILIP CAREY A CORPORATION OF OHIO UNITApplication filed July 9, 1928. Serial No. 291,326.

This invention relates to surfacing units, and aims to provide novel andimproved slabs adapted to be anchoredto a surface to be covered forforming a waterproof and acid-proof layer.

The invention consists in the features, combinations and arrangements,hereinafter described or claimed, for carrying out the above statedobject and such other objects as will hereinafter appear.

Generally described the invention comprises units preformed from ahomogeneous mixture of bituminous material, linear fibers, and mineralmaterial. The mixture is pre pared and then formed into a standardsheet, from which the units may subsequently be shaped to conform to thesurface to be covered. Means are provided on the units for embeddingwithin a plastic layer to secure them in place and prevent any looseningthereof which would allow access of'water' and other deleterious matterto the protected understructure.

In the drawing Figure 1 is a perspective view of a unit embodying myinvention;

Figure 2 is a perspective view of a modified embodiment;

Figure 3 is a perspective View of a conduit lined with the novel units;

Figure 4 is a sectional view of a wall structure faced with the novelunits;

igure 5 is a perspective view of a modified manner of attaching theunits.

Specifically described the. inventi fied by unit 2 preformed from a ousmixture of bituminous compound, filling and hardening material. Thebituminous material is preferably prepared from blown and hard asphalt,grahamite and others, or one that has been blown to a very high meltingpoint and has considerable binding qualities. In preparing a suitablemixture the proportion of bituminous compound to the filling andhardening material may be modified, depending'upon the use to which theslabs are to be put. One example of a suitable mixture comprisesbituminous compound between forty and fifty per cent (40 50%), linearfiber between ten and twenty on is typihomogeneto to per cent (1020%gregating about posed of felt fiber, undigested straw,

fib tlerial may be reenforced with terials as limestone dust,

tonite, barytes, powdered s dust, asbestos float, asbesto composed ofshort asbesto fiber waste, or asbestos waste combined with magnesia, orother small particles.

material may be by 3 to conform t duit 4, in which any part or all ofthe with projections 6 so ment can be made to which they are embedfirmly anchors the uni displacement which w tecting layer. A tight tweenadjacently laid u ing tongues 7 and grooves 8 on the edges.

materials above enumer a standard size and the forty or fifty per cent(40 The fiber is preferably combut may be digested or flax, hemp or anysoft If desired th 50 per cent).

rous material.

tougher fiber, ed by such maslate dust, berrilica, terra cotta s sand ormav be s fiber or asbestos 1e mineral filling is represent cement groundup into Sheets formed from this easily arched as indicated 0 thecurvature of any conthey are employed to line conduit.

Where the sheets are not to be arched, they e preferably made more denseand rigid by employing the harder bituminous material and a terial'.formed from a mixture comprising approximately sixty to seventy per cent(-70%) mineral matter and th' (30-40%) of the hard dense units aresuitabl ing, paving, or the li greater proportion of mineral ma- Forexample, a harder unit may be irty to forty per cent er asphalt. Themore he, a monolithic plastic The units may be adv and may be securedfoundation 5.

antageously provided that a secure attachany plastic layer in ded. Sucha union ts and prevents any ould impair the projoint is obtained benitsby forming mat- It will be seen that units formed from the ated may bemade of n subsequently shaped rface on which they are if constructed oftile,

conform to the su be laid, whereas cement or the like, they would haveto be of separate sizes for e work. duit or by means of a ach particulThese are secured directly to the conthin layer 9 of cement otheradhesive and earthy material age for wall facing, floore fibrous ma- Iar piece of In Figure 5 an alternative securing means is illustrated forjoining the units into a covering, the same comprising band in sertedthrough individual units laid side by Q 5 side in rows with brokenjoints.- H

d Obviously the invention is not limited to the details of theillustrated modifications, all ofwhich may 'be variously modified..Moreover, it is not indispensible that all fea- 10 tures of theinvention be used conjointly as certain of them ma be employed toadvanta e in various di erent combinations and su -combinations.

Havin described my invention I claim:

1. Lining units for conduits comprisingf homogeneous bod of yieldablefiberized ituminous materiai arched to conform to the conduit to belined; and projections on the face of the unit for keying same to thecon duit.

2. Lining units for conduits comprising a homogeneous body of yieldablefiberized bituminous material arched to conform to the conduit to belined, projections on the face of the'units for keying same to theconduit,

and the edges tongued and grooved to match with adjacently laid units.

3. Protecting units for curved surfaces, comprising a homogeneousmixture of yieldable fiberized bituminous material arched to conform tothe contour of the surface to be covered, anchoring keys on one face ofthe unit, and roundedtongue and grooved edges whereby the units maybe'laid adjacently with tight joints.

4. Lining units for conduits comprising a preformed body of fiberizedbituminous composition of yieldable character whereby same may be archedto conform to the contour of s 40 the conduit to be-lined, and means forattaching the lining in position 5. Lming units for conduits comprisinga preformed body of fiberized bituminous composition of ieldablecharacter provided with matched e ges whereby adjacent units may beclosely fitted in an angular position, and means for attaching t elining in position.

Signed at Chicago, in the county of Cook and State of Illinois, this30th day of June ALBERT o. FISCHER.

